genuine genius it's not the first time i see a concept of a elephant-mammoth mount, or even a skeleton elephant-mammoth, but this way of riding it, i never thought or seen something like this xD This way if you meet dire weather, you can be sheltered in there, or if you have lots of luggage you can carry it in the elephant ribcage xD

This would be quite an amusing bomb to drop on a party. They've got the nexromancer on the run, and he slips down a side tunnel to his "garage" and then the party follows, they see this and then it's two 1d12+6 slam attacks, two 1d8 gore attacks and a trample special! And it's armored! I'm totally stealing this idea.